Elektronička gotovina i sustav Bitcoin

undergraduate thesis

• Title (english): Electronic cash and the Bitcoin system
• Author: Ivan Katanić
• Mentor: Ante Đerek (mentor)
• Committee member: Ante Đerek (predsjednik povjerenstva)
• Committee member: Ivan Budiselić (član povjerenstva)
• Committee member: Klemo Vladimir (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2014-07-14, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

Opće nezadovoljstvo ljudi postojećim valutama i bankama rezultiralo je pojavom
alternativnih valuta. Najpoznatija je svakako Bitcoin, decentralizirani sustav za elektroničko gotovinsko plaćanje. Čitatelje se prvo upoznaje s pojmom digitalne valute i zatim s detaljnim opisom rada Bitcoin protokola. Opširno se opisuje "dokaz o radu" kojim se rješava poznati problem dvostrukog trošenja. Analizira se sigurnost od napadača koji konotrolira određeni udio mreže. Opisuje se i analizira proces rudarenja, postupak kojim se potvrđuju transakcije, a ujedno i stvaraju nove jedinice novca. U posljednjem poglavlju daje se kvantitativna analiza Bitcoin grafova, posebice približnog korisničkog grafa. Analizira se aktivnost korisnika i pokušavaju otkriti identiteti najaktivnijih.

Abstract (english)

General dissatisfaction of people with existing banks and currencies have resulted
in appearing of alternative currencies. The most famous certainly is Bitcoin, a decentralized peer to peer electronic cash system. Readers are first introduced to the concept
of digital currency and then to a detailed description of Bitcoin protocol. Proof-of-
work is extensively described as it solves the famous problem of double spending.
Safety from double spending attacker that controls certain part of network is analysed
too. The last chapter gives quantitative analysis of Bitcoin graphs, especially the user
graph. Most active users are analysed and identity of some of them is discovered through web searching.

• Keywords: Bitcoin; digitalna valuta; kriptografija; dokaz o radu; dvostruko trošenje; lanac blokova; analiza korisničkog grafa
• Keywords (english): Bitcoin; digital currency; cryptography; proof of work; double spending; blockchain; user graph analysis
• Language: croatian
• URN:NBN: urn:nbn:hr:168:537487
• Study programme: Title: Computing; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2018-02-05 17:36:37